Fast - It respond quickly to user
interactions with silky smooth animations and no janky scrolling.

Integrated - The user doesn’t have to
reach through the browser, it uses the full capabilities of the device
to create an experience true to the device.

Reliable - Load instantly and reliably,
never showing the downasaur, even in uncertain network conditions.

Engaging - Keeps the user coming back
to the app with beautifully designed experiences that look and feel
natural.

Delightful web experiences are...

Fast

Users don’t expect janky scrolling or slow load performance. Making your
site fast is a process that starts with understanding
how RAIL affects the performance of your
site and how use that to measure and improve your performance.

Integrated

User experiences on the web should feel like an integrated part of the
user's device; instead of having to reach through a browser window, the
experience should feel true to how the user interacts with the device.

Reliable

Users don’t expect the web to work without a network connect, and often
don’t even bother to try when it’s a slow or intermittent connection.
We need to change that perception. The web must be reliable.

Engaging

An engaging app goes beyond functional, but ensures that the whole
experience is delightful making it easy for the user to do what they
need to do. Using features like Web Push, it’s always up to date, and
Notifications keeps users informed. It uses the right capabilities,
at the right time, in a beautiful way.

Sensors For The Web!
Sensors are used in many native applications to enable advanced features. Wouldn't it be nice to bridge the gap between native and the web? You can do it with Generic Sensor API, which is available for Origin Trials in Chrome 62.

Deprecations and Removals in Chrome 62
A round up of the deprecations and removals in Chrome 62 to help you plan. In this version, more restrictions on insecure origins and a change to the shadow-piercing descendant combinator.

The Payment Request API is a W3C standard candidate meant to eliminate checkout forms. It improves the purchase process, provides a more consistent user experience and allows you to easily leverage different payment methods.